建立了在线凝胶渗透色谱-气相色谱/质谱(GPC-GC/MS)分析茶叶中153种农药残留的方法.样品用乙腈超声提取,提取液经石墨化炭黑固相萃取柱净化后,经GPC-GC/MS在线净化、分离和检测.方法的加标回收率为73.32%～117.05% ,相对标准偏差为0.76%～13.18% .方法的检出限和定量限范围分别为 0.0003～0.006 mg/kg 和0.001～0.02 mg/kg.该方法样品前处理简单、分析时间短,灵敏度和精密度均符合农药多残留检测技术的要求,适用于茶叶中多种农药残留的检测.
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